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Phytotoxicity and some interactions of the essential trace metals iron, manganese, molybdenum, zinc, copper, and boron

Journal Article · · Commun. Soil Sci. Plant Anal.; (United States)
The essential trace elements Fe, Mn, Zn, Cu, and B in high concentrations can produce phytotoxicities. Iron toxicity resulted from 5 x 10/sup -4/M and 10/sup -3/M FeSO/sub 4/, but not from equivalent amounts of FeEDDHA (ferric ethylenediamine di (o-hydroxyphenylacetic acid)). Leaf concentrations in bush beans of 465 ..mu..g Mn/g, 291 ..mu..g B/g, and 321 ..mu..g Zn/g all on the dry weight basis resulted in 27 percent, 45 percent, and 34 percent reduction in yields of leaves, respectively. Zinc was concentrated in roots while Mn and B concentrated in leaves. Solution concentrations of MnSO/sub 4/ of 10/sup -3/ and 10/sup -2/M depressed leaf yields of bush beans by 63 percent and 83 percent respectively, with 5140 and 10780 ..mu..g Mn/g dry weight of leaves. Copper concentrations were simultaneously increased and those of Ca were decreased. Bush bean plants grown in Yolo loam soil with 200 ..mu..g Cu/g soil had a depression in leaf yield of 26 percent (with 28.8 ..mu..g Cu/g leaf); plants failed to grow with 500 ..mu..g Cu/g soil. A level of 10/sup -3/M H/sub 2/MoO/sub 4/ was toxic to bush beans grown in solution culture. Leaves, stems, and roots, respectively, contained 710, 1054, and 5920 ..mu..g Mo/g dry weight.
Research Organization:
Univ. of California, Los Angeles
OSTI ID:
7208258
Journal Information:
Commun. Soil Sci. Plant Anal.; (United States), Journal Name: Commun. Soil Sci. Plant Anal.; (United States) Vol. 8:9; ISSN CSOSA
Country of Publication:
United States
Language:
English